Publication

Comparative analysis and modeling of both standing and travelling wave ultrasonic linear motor

Yves Perriard
2003
Conference Papers

Abstract

A comparative study on the two different kinds of ultrasonic linear motors (ULM), standing and travelling wave types, is described. Analytical modeling using the wave theory and the contact mechanisms is presented. The former is used to describe the wave propagation in the stator, the latter to describe the interface between the slider and the stator, where the tangential and normal forces generated by the contact points allow the slider to describe a linear motion. FEM simulations allow to obtain transient and steady-state responses of the system and also to validate the analytical model. Harmonic analysis is also performed to find out the resonance frequency of the system and thus achieve a maximal amplitude response. In addition to these numerical analyses, some practical results on a standing wave linear motor are presented

Official source

https://infoscience.epfl.ch/entities/publication/9c270b58-f923-4b73-b951-03cc5e775bb3

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Yves Perriard
2003
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9c270b58-f923-4b73-b951-03cc5e775bb3

About this result

Related concepts (32)

Wave

In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Waves can be periodic, in which case those quantities oscillate repeatedly about an equilibrium (resting) value at some frequency. When the entire waveform moves in one direction, it is said to be a traveling wave; by contrast, a pair of superimposed periodic waves traveling in opposite directions makes a standing wave.

Standing wave

In physics, a standing wave, also known as a stationary wave, is a wave that oscillates in time but whose peak amplitude profile does not move in space. The peak amplitude of the wave oscillations at any point in space is constant with respect to time, and the oscillations at different points throughout the wave are in phase. The locations at which the absolute value of the amplitude is minimum are called nodes, and the locations where the absolute value of the amplitude is maximum are called antinodes.

Piezoelectric motor

A piezoelectric motor or piezo motor is a type of electric motor based on the change in shape of a piezoelectric material when an electric field is applied, as a consequence of the converse piezoelectric effect. An electrical circuit makes acoustic or ultrasonic vibrations in the piezoelectric material, most often lead zirconate titanate and occasionally lithium niobate or other single-crystal materials, which can produce linear or rotary motion depending on their mechanism.

Related publications (12)

Comparative analysis and modeling of both standing and travelling wave ultrasonic linear motor

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